2026 Cocodona 250: Medical emergency results in runner’s death during ultramarathon

A runner at the 2026 Cocodona 250 experienced a medical emergency during the event and died Wednesday, organizers announced.

In a social-media post, organizers said a participant experienced a “serious medical emergency,” which resulted in their death. Organizers did not reveal the identity of the participant “out of respect for the runner’s family and loved ones.”

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They also announced that the ultramarathon would continue, and urged other participants to “carry the memory of this runner with you on the trail.”

The event’s full statement read:

“We are deeply saddened to share that a participant experienced a serious medical emergency today during the event and has passed away. The runner’s family and crew have been notified.

“Out of respect for the runner’s family and loved ones, we are not sharing additional personal details at this time. Our team is supporting those directly involved and will share more only when appropriate.

“Please keep the runner’s family, friends, fellow runners, volunteers, and first responders in your thoughts. We are deeply grateful to this beautiful community.

“The race is going to continue in their honor. We ask all participants and crew to carry the memory of this runner with you on the trail.”

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Runners began the ultramarathon Monday. The event, which covers 253.3 miles, runs through Saturday.

What is the Cocodona 250?

The Cocodona 250 is an annual ultramarathon held in Arizona. The event, which started in 2021, “links together some of the most iconic trails and towns in Arizona,” per Aravaiparunning.com.

The event stretches over 250 miles and contains stark changes in elevation. The ultramarathon takes days to complete. Last year’s top finisher on the men’s side, American Dax Hock, completed the event in over 79 hours. The top finisher on the woman’s side last year, American Jesse Morton-Langehaug, took over 92 hours to complete the marathon.

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Runners who wish to compete in the Cocodona 250 must pay an entry fee of over $1,600 to take part in the event.